<template>
	<div>
		<el-breadcrumb separator-class="el-icon-arrow-right">
			<el-breadcrumb-item :to="{ path: '/Home' }">首页</el-breadcrumb-item>
			<el-breadcrumb-item>商品管理</el-breadcrumb-item>
			<el-breadcrumb-item :to="{ path: '/Goods' }">商品列表</el-breadcrumb-item>
			<el-breadcrumb-item>添加商品</el-breadcrumb-item>
		</el-breadcrumb>
		<el-card>
			<el-alert
				title="添加商品信息"
				type="info"
				center
				show-icon
				:closable="false"
			>
			</el-alert>
			<!-- 步骤条 -->
			<el-steps
				:space="200"
				:active="activeIndex - 0"
				finish-status="success"
				align-center
			>
				<el-step title="基本信息"></el-step>
				<el-step title="商品参数"></el-step>
				<el-step title="商品属性"></el-step>
				<el-step title="商品图片"></el-step>
				<el-step title="商品内容"></el-step>
				<el-step title="完成"></el-step>
			</el-steps>
			<el-form
				:model="addForm"
				:rules="addFormRules"
				ref="addFormRef"
				label-width="100px"
				label-position="top"
			>
				<el-tabs
					:tab-position="'left'"
					v-model="activeIndex"
					:before-leave="beforeTabLeave"
					@tab-click="tabClicked"
				>
					<el-tab-pane label="基本信息" name="0">
						<el-form-item label="商品名称" prop="goods_name">
							<el-input v-model="addForm.goods_name"></el-input>
						</el-form-item>
						<el-form-item label="商品价格" prop="goods_price">
							<el-input v-model="addForm.goods_price" type="number"></el-input>
						</el-form-item>
						<el-form-item label="商品重量" prop="goods_weight">
							<el-input v-model="addForm.goods_weight" type="number"></el-input>
						</el-form-item>
						<el-form-item label="商品数量" prop="goods_number">
							<el-input v-model="addForm.goods_number" type="number"></el-input>
						</el-form-item>
						<el-form-item label="商品分类" prop="goods_cat">
							<el-cascader
								v-model="addForm.goods_cat"
								:options="cateList"
								:props="{ expandTrigger: 'hover', ...cateProps }"
								@change="handleChange"
							></el-cascader>
						</el-form-item>
					</el-tab-pane>
					<el-tab-pane label="商品参数" name="1">
						<el-form-item
							:label="item.attr_name"
							v-for="item in manyTableData"
							:key="item.attr_id"
						>
							<el-checkbox-group v-model="item.attr_vals">
								<el-checkbox
									:label="cb"
									v-for="(cb, i) in item.attr_vals"
									:key="i"
								></el-checkbox>
							</el-checkbox-group>
						</el-form-item>
					</el-tab-pane>
					<el-tab-pane label="商品属性" name="2">
						<el-form-item
							:label="item.attr_name"
							v-for="item in onlyTableData"
							:key="item.attr_id"
						>
							<el-input v-model="item.attr_vals"></el-input>
						</el-form-item>
					</el-tab-pane>
					<el-tab-pane label="商品图片" name="3">
						<el-upload
							action="https://lianghj.top:8888/api/private/v1/upload"
							:on-preview="handlePreview"
							:on-remove="handleRemove"
							list-type="picture"
							:headers="headerObj"
							:on-success="handleSuccess"
						>
							<el-button size="small" type="primary">点击上传</el-button>
						</el-upload>
					</el-tab-pane>
					<el-tab-pane label="商品内容" name="4">
						<quill-editor v-model="addForm.goods_introduce"></quill-editor>
						<el-button type="success" class="addBtn" @click="completeAdd">完成添加</el-button>
					</el-tab-pane>
				</el-tabs>
			</el-form>
		</el-card>
		<!-- 图片预览 -->
		<el-dialog
			title="图片预览"
			:visible.sync="previewVisible"
			width="50%"
		>
			<img :src="previewPath" alt="">
		</el-dialog>
	</div>
</template>
<script>
import _ from 'lodash'
export default {
	data() {
		return {
			activeIndex: '0',
			addForm: {
				goods_name: '',
				goods_price: 0,
				goods_weight: 0,
				goods_number: 0,
				goods_cat: [],
				pics: [],
				goods_introduce: '',
				attrs: []
			},
			addFormRules: {
				goods_name: [
					{
						required: true,
						message: '请输入商品名称',
						trigger: 'blur',
					},
				],
				goods_price: [
					{
						required: true,
						message: '请输入商品价格',
						trigger: 'blur',
					},
				],
				goods_weight: [
					{
						required: true,
						message: '请输入商品重量',
						trigger: 'blur',
					},
				],
				goods_number: [
					{
						required: true,
						message: '请输入商品数量',
						trigger: 'blur',
					},
				],
				goods_cat: [
					{
						required: true,
						message: '请选择商品分类',
						trigger: 'blur',
					},
				],
			},
			cateList: [],
			cateProps: {
				label: 'cat_name',
				value: 'cat_id',
				children: 'children',
			},
			manyTableData: [],
			onlyTableData: [],
			// 上传图片的请求头
			headerObj: {
				Authorization: window.sessionStorage.getItem('token'),
			},
			previewPath: '',
			previewVisible: false
		}
	},
	created() {
		this.getCateList()
	},
	methods: {
		// 获取商品分类数据
		async getCateList() {
			const { data: res } = await this.$http.get('categories')
			if (res.meta.status != 200) {
				return this.$message.error('获取商品分类失败')
			}
			this.cateList = res.data
		},
		handleChange() {
			if (this.addForm.goods_cat.length != 3) {
				this.addForm.goods_cat = []
			}
		},
		beforeTabLeave(activeName, oldActiveName) {
			if (oldActiveName == '0' && this.addForm.goods_cat.length != 3) {
				this.$message.error('请先选择商品分类')
				return false
			}
		},
		//商品参数和静态属性的获取
		async tabClicked() {
			if (this.activeIndex == '1') {
				const { data: res } = await this.$http.get(
					`categories/${this.cateId}/attributes`,
					{ params: { sel: 'many' } }
				)
				if (res.meta.status != 200) {
					return this.$message.error('获取参数失败')
				}
				res.data.forEach((item) => {
					item.attr_vals =
						item.attr_vals.length == 0 ? [] : item.attr_vals.split(' ')
				})
				this.manyTableData = res.data
			} else {
				if (this.activeIndex == '2') {
					const { data: res } = await this.$http.get(
						`categories/${this.cateId}/attributes`,
						{ params: { sel: 'only' } }
					)
					if (res.meta.status != 200) {
						return this.$message.error('获取属性失败')
					}
					this.onlyTableData = res.data
				}
			}
		},
		// 处理图片的预览效果
		handlePreview(file) {
			this.previewPath = file.url
			this.previewVisible = true
		},
		// 处理移除图片的操作
		handleRemove(file) {
			const filePath = file.response.data.tem_path
			const i = this.addForm.pics.findIndex((x) => x.pic == filePath)
			this.addForm.pics.splice(i, 1)
		},
		//监听图片上传成功
		handleSuccess(response) {
			const picInfo = { pic: response.data.tem_path }
			this.addForm.pics.push(picInfo)
		},
		//完成添加商品
		completeAdd() {
			this.$refs.addFormRef.validate(async valid => {
				if(!valid) {
					return this.$message.error('请填写必须的信息')
				}
				const form = _.cloneDeep(this.addForm)
				form.goods_cat = form.goods_cat.join(',')
				//处理动态参数和静态属性 
				this.manyTableData.forEach(item => {
					const newInfo = {attr_id: item.attr_id, attr_value: item.attr_vals.join(' ')}
					this.addForm.attrs.push(newInfo)
				})
				this.onlyTableData.forEach(item => {
					const newInfo = {attr_id: item.attr_id, attr_value: item.attr_vals}
					this.addForm.attrs.push(newInfo)
				})
				form.attrs = this.addForm.attrs
				const {data:res} = await this.$http.post('goods', form)
				if(res.meta.status != 201) {
					return this.$message.error('添加商品失败')
				}
				this.$message.success('添加商品成功')
				this.$router.push('/goods')
			})
		}
	},
	computed: {
		cateId() {
			if (this.addForm.goods_cat.length == 3) {
				return this.addForm.goods_cat[2]
			}
			return null
		},
	},
}
</script>
<style lang="less" scoped>
.el-checkbox {
	margin: 0px 8px 0px 0px !important;
}
.addBtn {
	margin: 10px 0px 0px 0px;
	border-radius: 5px;
}
</style>
